C08F 4/6592
Containing at least one cyclopentadienyl ring, condensed or not
Official title: containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
C08F4/6592 (Containing at least one cyclopentadienyl ring, condensed or not) appears on 2,701 US grants and 2,118 published applications in this corpus.
Search patents in C08F- Granted patents
- 2,701
- Published applications
- 2,118
- Assignees
- 358
- Inventors
- 3,268
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 15 | 0 |
| 1991 | 22 | 0 |
| 1992 | 18 | 0 |
| 1993 | 31 | 0 |
| 1994 | 38 | 0 |
| 1995 | 55 | 0 |
| 1996 | 65 | 0 |
| 1997 | 98 | 0 |
| 1998 | 82 | 0 |
| 1999 | 66 | 0 |
| 2000 | 104 | 0 |
| 2001 | 142 | 39 |
| 2002 | 138 | 108 |
| 2003 | 136 | 126 |
| 2004 | 94 | 119 |
| 2005 | 97 | 93 |
| 2006 | 76 | 72 |
| 2007 | 66 | 69 |
| 2008 | 44 | 71 |
| 2009 | 43 | 66 |
| 2010 | 56 | 62 |
| 2011 | 56 | 69 |
| 2012 | 58 | 74 |
| 2013 | 66 | 95 |
| 2014 | 88 | 78 |
| 2015 | 81 | 85 |
| 2016 | 105 | 124 |
| 2017 | 97 | 112 |
| 2018 | 94 | 91 |
| 2019 | 88 | 109 |
| 2020 | 77 | 73 |
| 2021 | 104 | 121 |
| 2022 | 80 | 105 |
| 2023 | 67 | 52 |
| 2024 | 46 | 54 |
| 2025 | 63 | 24 |
| 2026 | 31 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Olefinic polymer, and method for preparing same15 Sep 2026US 12,735,515 B2Hanwha Solutions Corporation
- Composition for encapsulant film and encapsulant film comprising the same8 Sep 2026US 12,729,256 B2LG Chem.Ltd.
- Ethylene copolymer and method for preparation thereof and composition and crosslinked polymer and tire1 Sep 2026US 12,723,117 B2China Petroleum & Chemical Corporation
- Ethylene-octene copolymers with improved property profile1 Sep 2026US 12,723,118 B2Borealis AG
- Polyethylene30 Jun 2026US 12,668,653 B2LG Chem.Ltd.
- Ethylene/alpha-olefin copolymer and preparation method thereof8 Oct 2026US 2026/0308291 A1China Petroleum & Chemical Corporation
- Asymmetrical hafnium metallocenes10 Sep 2026US 2026/0265283 A1Dow Global Technologies LLC
- Symmetrical hafnium metallocene for making polymers with broad-orthogonal composition distributions10 Sep 2026US 2026/0265284 A1Dow Global Technologies LLC
- Dual Catalyst System for Producing High Density Polyethylenes With Long Chain Branching10 Sep 2026US 2026/0265420 A1Chevron Phillips Chemical Company LP
- Polyolefin compositions for rotomolding10 Sep 2026US 2026/0265429 A1Dow Global Technologies LLC
Most cited
By later US patents
- Elastic substantialy linear olefin polymers1,117US 5,278,272 AThe Dow Chemical Company · 1994
- Supported polymerization catalyst710US 4,808,561 AExxon Chemical Patents Inc. · 1989
- Ionic metallocene catalyst compositions596US 5,198,401 AExxon Chemical Patents Inc. · 1993
- Catalyst system of enhanced productivity544US 5,153,157 AExxon Chemical Patents Inc. · 1992
- Process and catalyst for polyolefin density and molecular weight control529US 5,324,800 AExxon Chemical Patents Inc. · 1994